Login with Facebook Fix by getartup

We currently have some code and o-auth done to integrate the "Login with Facebook" button and features with our website. It is not working, and producing some errors for users, so I need someone to build a working one for me or de-bug the current issue on the one we have installed that is producing errors for some people when they try to login with it. If someone is good at dealing with Facebook bugs they might be able to fix our issue easily and not rewrite things, but it might also require re-tooling.